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good morning this is chapter 13 on perimeter and area of rectangles vocab words perimeter the perimeter is the distance around the outside of the state for looking at a rectangle measure the Descendants around and if we're looking at a rectangle and we're trying to find the perimeter we would add up all the sides so if this side is 12 inches and this side is 4 in the rectangles opposite sides are equal to 12 is this is foreign to see opposite side with also be four inches so we do 12 + 12 + 4 + 4 4 + 4 is 8 add those together can you get a perimeter 32 inches perimeter distance around the outside measure inside circus what we call where you how many squares of a certain size fit inside the state how many little squares in a little square that's an inch on each side would fit inside the state now sometimes a safe will have those where's already drawn on it to get to area find you have to use the area formula for a rectangle in the area formula for a rectangle is area office. Written the bottom side of a shape and the height is a side that hits the base of the right angle it means the exact same thing this would be the base but usually people for rectangle has a length times width times length formula area equals length times width area equals find the width which is 412 * 4 is 48 remember that were measuring and square where 48 square inches perimeter of 32 square units say in your workplace you have 135 and 136 so where to start on 135 it says complete to find the area of each figure inside service giving us a picture and they want us to find the length and the width so let's start with length how many units long is this 3 4 5 that's 5 minutes long and then how many units Y-12 two units of length times width formula v x 2 in yards squared area is find yard Times Square yards for the next one is labeled don't have the grades is labeled with information find the length for length find the West the width is 4 16 * 4 to the side 24 carry the two 4 x - 4 + 2/6 + 64 seat Square the area of 64 ft squared alright next section it says find the perimeter and area of each rectangle Serenity perimeter fence around the outside by adding up the side and then area Surface by multiplying the length times width equal the perimeter adding up all the time + 4 or to do 4 x 4 which is 16 inches of a perimeter of 16 for area we do length times width for size 4 16 in square in South Bend to have the same perimeter and area that's not always Reapers where they will always be the same the difference here is that the areas in square units perimeter than just regular inches super perimeter we're going to exercise talk to you when you're doing parameter you can quickly label the two sides the opposite sides that aren't labeled and then Adam 6 + 2 + 8/8 + 6 + 14 + 14 + 2 + 16 + 16 C for area we're doing length Times Square perimeter we have five five forces of this is size and we know this is five at this is for we know this is for I'm going to do 5 + 5 is 10 4 + 48 to 10 + 8 is 18 have a perimeter of 18 yards and then for the area we do length times width length times width 5 * 4 is 20 yard squared 136 example of number 8 call wanted one of them all in her room blue on Spotify by 3 what is the area of the wall she has to paint painting your covering the inside surface of the so we're going to be looking for area remember area of a rectangle is equal to length x width find whit3 area is equal to 5 * 3 is 15 and its meters so we're going to put it under the mat sq4r the area of a nature reserve is 100 square miles trees were planted on a square plot of land in Reserve with sides that measure 8 Mile East what is the area of the nature reserve not covered by oak trees so let's make the reserve and we don't necessarily know the length and the width of this whole thing but we know that the area of this entire Nature Reserve is 100 square mile we know that they came along and they planted a square plot of land 8 miles on east side they planted it with so inside here area of the nature reserve is not covered by the oak trees are asking what is the area of a sphere don't think about what we know we know the whole rectangle is 100 square mile we know that they took this part of it and planted trees we're trying to figure out what part does not have trees so we need to figure out how much are covered by the trees since we know the length and the width the area so what is 8 * 8/9 * 8 * 864 64 air miles are covered 4 square miles has trees 100 square fire Park so we want to know which part does not have for you we're going to subtract 300 - 264 fire crosses euros 36 square miles so what we found out is that 36 square miles does not have trees on it that's it for say you have an awesome also paid you can do on conversions if you want to look back at page 99 you can try that one and then that's it for the mass for today

Uploaded by Abigail Maeder.

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